Unverified85% confidenceTradeoffTime unknown
二价铁（亚铁）吸收率显著高于三价铁，但对肠胃刺激也更强；肠胃敏感或呕吐明显的宝宝可选多糖铁复合物（三价铁）或双甘氨酸螯合铁，刺激性小但需接受吸收率略低
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Unverified补铁选二价铁（如富马酸亚铁、甘氨酸亚铁/螯合铁）吸收率优于三价铁；甘氨酸亚铁胃肠刺激小、便秘黑便少，适合婴幼儿和哺乳期，是刺激敏感人群首选94% similarUnverified补铁剂型选择：二价铁（亚铁，如富马酸亚铁、甘氨酸亚铁）吸收率高但易致胃肠刺激和便秘；三价铁（多糖铁复合物）刺激小、口感好但吸收较慢，婴幼儿优先甘氨酸亚铁或多糖铁92% similarUnverified二价铁（亚铁Fe2+）吸收率高于三价铁（Fe3+），但三价铁（如多麦芽糖铁、蔗糖铁）对胃刺激小、几乎不与食物结合，适合无法耐受二价铁的孕妇长期服用90% similarUnverified螯合铁（如甘氨酸亚铁/双甘氨酸螯合铁）胃肠道刺激性明显低于硫酸亚铁，便秘、黑便、恶心发生率更低，适合肠胃敏感或抗拒普通铁剂的宝宝90% similarUnverified液态铁选择二价铁（如甘氨酸亚铁、乳酸亚铁）吸收率高于三价铁，且甘氨酸螯合形式对胃肠道刺激小、便秘和黑便概率更低，适合孕妇和胃肠敏感人群90% similar
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